Coincidentally, my idol is Andrew, so this question was answered directly for me. When I first saw Andrew, I was probably attracted by his face value, so that in addition to the photos of familiar people, there was only Andrew in the album. Later, I slowly found out that this is a treasure boy, who can sing and dance well, has good acting skills and likes to start cars, so I unconsciously want to know more about this boy.
Besides Takayuki Yamada, Andrew's favorite star and idol is his long-dead brother Leslie Cheung. In fact, many people say that the entertainment circle is most like Andrew in Leslie Cheung now, probably because he is particularly fond of him, and his appearance is inevitably biased towards Leslie Cheung.
I remember in a variety show, Andrew was lucky enough to reappear Farewell My Concubine with a partner in Leslie Cheung. Even Andrew's makeup was made by the master who helped Leslie Cheung make up. I believe Yin is so excited that he can even feel that he is going to cry sometimes. I guess that time was the closest he was to his idol. In addition, it is because of Leslie Cheung that Andrew became a star, so some people say that Andrew's idolization made him a star.